diff --git a/compiler/utils/x86/assembler_x86.cc b/compiler/utils/x86/assembler_x86.cc
index 44efc65..a614193 100644
--- a/compiler/utils/x86/assembler_x86.cc
+++ b/compiler/utils/x86/assembler_x86.cc
@@ -1523,6 +1523,13 @@
 }
 
 
+void X86Assembler::repe_cmpsl() {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xF3);
+  EmitUint8(0xA7);
+}
+
+
 X86Assembler* X86Assembler::lock() {
   AssemblerBuffer::EnsureCapacity ensured(&buffer_);
   EmitUint8(0xF0);
diff --git a/compiler/utils/x86/assembler_x86.h b/compiler/utils/x86/assembler_x86.h
index e2abcde..ae8d7a1 100644
--- a/compiler/utils/x86/assembler_x86.h
+++ b/compiler/utils/x86/assembler_x86.h
@@ -466,6 +466,7 @@
 
   void repne_scasw();
   void repe_cmpsw();
+  void repe_cmpsl();
 
   X86Assembler* lock();
   void cmpxchgl(const Address& address, Register reg);
diff --git a/compiler/utils/x86/assembler_x86_test.cc b/compiler/utils/x86/assembler_x86_test.cc
index 0e8c4ae..7663580 100644
--- a/compiler/utils/x86/assembler_x86_test.cc
+++ b/compiler/utils/x86/assembler_x86_test.cc
@@ -202,4 +202,10 @@
   DriverStr(expected, "Repecmpsw");
 }
 
+TEST_F(AssemblerX86Test, Repecmpsl) {
+  GetAssembler()->repe_cmpsl();
+  const char* expected = "repe cmpsl\n";
+  DriverStr(expected, "Repecmpsl");
+}
+
 }  // namespace art
diff --git a/compiler/utils/x86_64/assembler_x86_64.cc b/compiler/utils/x86_64/assembler_x86_64.cc
index 93c90db..1dd4a2e 100644
--- a/compiler/utils/x86_64/assembler_x86_64.cc
+++ b/compiler/utils/x86_64/assembler_x86_64.cc
@@ -2081,6 +2081,13 @@
 }
 
 
+void X86_64Assembler::repe_cmpsl() {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xF3);
+  EmitUint8(0xA7);
+}
+
+
 void X86_64Assembler::LoadDoubleConstant(XmmRegister dst, double value) {
   // TODO: Need to have a code constants table.
   int64_t constant = bit_cast<int64_t, double>(value);
diff --git a/compiler/utils/x86_64/assembler_x86_64.h b/compiler/utils/x86_64/assembler_x86_64.h
index 0cd3197..89a5606 100644
--- a/compiler/utils/x86_64/assembler_x86_64.h
+++ b/compiler/utils/x86_64/assembler_x86_64.h
@@ -604,6 +604,7 @@
 
   void repne_scasw();
   void repe_cmpsw();
+  void repe_cmpsl();
 
   //
   // Macros for High-level operations.
diff --git a/compiler/utils/x86_64/assembler_x86_64_test.cc b/compiler/utils/x86_64/assembler_x86_64_test.cc
index 2c1a6a1..e1e4c32 100644
--- a/compiler/utils/x86_64/assembler_x86_64_test.cc
+++ b/compiler/utils/x86_64/assembler_x86_64_test.cc
@@ -1269,4 +1269,10 @@
   DriverStr(expected, "Repecmpsw");
 }
 
+TEST_F(AssemblerX86_64Test, Repecmpsl) {
+  GetAssembler()->repe_cmpsl();
+  const char* expected = "repe cmpsl\n";
+  DriverStr(expected, "Repecmpsl");
+}
+
 }  // namespace art